Recently I was getting to know two new congressional candidates running for seats held by Republicans in California. I asked one why he had donated so much money to John Kasich's presidential campaign in 2016. He told me he "used to be" a Republican. And now he wants to be in Congress... as a Democrat? "Ex"-Republicans that were elected last year-- Charlie Crist (FL) and Tom O'Halleran (AZ), for example-- vote overwhelmingly with the GOP against progressive legislation, as "ex"-Republicans...